| Title: | Enhancing sludge biodegradability and volatile fatty acid production by tetrakis hydroxymethyl phosphonium sulfate pretreatment |
| Author(s): | Wu QL; Guo WQ; Bao X; Yin RL; Feng XC; Zheng HS; Luo HC; Ren NQ; |
| Address: | "State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China. Electronic address: guowanqian@hit.edu.cn" |
| DOI: | 10.1016/j.biortech.2017.05.016 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "A new pretreatment method based on tetrakis hydroxymethyl phosphonium sulfate (THPS) biocide was tried to enhance sludge disintegration, and improved sludge biodegradability and subsequent volatile fatty acid (VFA) production. Sludge activity decreased to less than 10% after 2 days pretreatment using 20mg/g-TSS THPS, which also obviously destroyed EPS and cell membrane, and dissolved more biodegradable substances (48.8%) than raw sludge (19.7%). Moreover, 20mg/g-TSS THPS pretreatment shortened fermentation time to 4days and improved VFA production to 2778mg COD/L (4.35 times than that in control). Therein, the sum of n-butyric, n-valeric and iso-valeric acids unexpectedly accounted for 60.5% of total VFA (only 20.1% of that in control). The more high molecular weight VFAs (C4-C5) than low molecular VFAs (C2-C3) resulted from THPS pretreatment benefited to subsequent medium-chain volatile acids (C6-C12) generation to realize the separation and recovery of organic carbon more efficiently" |
| Keywords: | "*Fatty Acids, Volatile Fermentation Hydrogen-Ion Concentration *Organophosphorus Compounds *Sewage Biodegradability Eps Sludge Thps Vfa;" |
| Notes: | "MedlineWu, Qing-Lian Guo, Wan-Qian Bao, Xian Yin, Ren-Li Feng, Xiao-Chi Zheng, He-Shan Luo, Hai-Chao Ren, Nan-Qi eng England 2017/06/03 Bioresour Technol. 2017 Sep; 239:518-522. doi: 10.1016/j.biortech.2017.05.016. Epub 2017 May 5" |
